EP0888742A1 - Noise absorbing device for vacuum cleaner - Google Patents

Noise absorbing device for vacuum cleaner Download PDF

Info

Publication number
EP0888742A1
EP0888742A1 EP98303842A EP98303842A EP0888742A1 EP 0888742 A1 EP0888742 A1 EP 0888742A1 EP 98303842 A EP98303842 A EP 98303842A EP 98303842 A EP98303842 A EP 98303842A EP 0888742 A1 EP0888742 A1 EP 0888742A1
Authority
EP
European Patent Office
Prior art keywords
air
main body
front casing
suction motor
side face
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP98303842A
Other languages
German (de)
French (fr)
Inventor
Nam-Ho Lee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WiniaDaewoo Co Ltd
Original Assignee
Daewoo Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1019970029905A external-priority patent/KR19990005690A/en
Priority claimed from KR1019970055331A external-priority patent/KR100231436B1/en
Application filed by Daewoo Electronics Co Ltd filed Critical Daewoo Electronics Co Ltd
Publication of EP0888742A1 publication Critical patent/EP0888742A1/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/10—Filters; Dust separators; Dust removal; Automatic exchange of filters
    • A47L9/12—Dry filters
    • A47L9/122—Dry filters flat
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/0081—Means for exhaust-air diffusion; Means for sound or vibration damping
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies

Definitions

  • the present invention relates to a noise absorbing device for a vacuum cleaner.
  • a substantially conventional vacuum cleaner comprises a suction motor 2 provided in a cleaner housing 1.
  • the suction motor 2 is connected with a suction port 8.
  • the air is exhausted to the rear portion of the suction motor 2 through the suction port 8.
  • the exhaust port provided on the back of the housing 1 for exhausting the purified air to the outside is denoted by the numeral 3.
  • the suction motor 2 for generating suction force communicates with the exhaust port 3 through both an air path 4 and an exhaust silencer 5.
  • the exhaust silencer 5 defines an exhaust path 6 therein. In the above noise absorbing device, the exhaust path 6 of the exhaust silencer 5 is inclined upwardly from an air path 4 at an obtuse angle.
  • the turbulence noise is partly absorbed and suppressed by a noise absorbing material 7.
  • the known noise absorbing device for a vacuum cleaner whilst partly absorbing and suppressing the exhaust noise caused by exhaust air flow having passed through the suction motor 2, does not achieve the desired noise absorbing and suppressing effect.
  • the exhaust air passing through the suction motor 2 is exhausted directly through a chink of the assembled part of the housing 1 to the outside, which causes the efficiency of the cleaning working to deteriorate.
  • a noise absorbing device for a vacuum cleaner having a suction motor installed within a casing, said noise absorbing device comprising air guiding means arranged to receive the air exhausted from said suction motor, the air guiding means being arranged to guide the exhausted air along a tortuous path to an air exhaust, and said noise absorbing device further comprising filter means associated with said air exhaust to filter the exhausted air as it exhausts through said air exhaust.
  • the provision of the tortuous path to the air exhaust in an embodiment increases the ability of the device to absorb noise.
  • said air guiding means is substantially cylindrical and is arranged to surround air exhaust outlets of the suction motor, and wherein the air guiding means is arranged within said casing and guides air exhausted through said exhaust outlets of the suction motor to an exhaust air path defined within said casing, which exhaust air path is terminated by said air exhaust and houses said filter means.
  • An embodiment of a noise absorbing device of the invention enables the efficiency of cleaning to be increased in that it enables substantially perfect sealing.
  • the present invention also extends to a noise absorbing device of a vacuum cleaner which comprises:
  • a motor packing member may be installed between the front casing and the suction motor to absorb noise and vibration of the motor generated during driving of the suction motor.
  • absorbing noise material is installed on the very long air flow path, for example, having the inner surface and the outer surface of the second main body of the air guider and the inner surface of the front casing. Noise generated by the suction motor during cleaning operations of the vacuum cleaner is thereby effectively suppressed and absorbed.
  • a linear recess part of U-shaped cross section is formed on an outermost edge of the opened surfaces of the front casing or the rear casing, and a linear sealing member is inserted, so that the sealing strength between the front casing and the rear casing can be strengthened.
  • a cross-section of a contact part between the opened side face of the first main body of the front casing and the closing plate of the air guider has a step shape, so that sealing strength between the opened side face of the front casing and the closing plate of the air guider can be strengthened.
  • the length of the second main body of the air guider is determined to correspond with that of the rear exhaust portion of the suction motor so that a circular end of the opened face of the second main body is closely fixed to the suction motor.
  • the circular end of the air guider is formed of sealing material such as rubber.
  • the length of the second main body of the air guider is determined to be shorter than that of the rear exhaust portion of the suction motor, so that the exhausted air from the suction motor is guided to the outside of the air guider through the aperture formed between an end of the second main body of the air guider and the suction motor.
  • a noise absorbing device of the present invention since sealing strength of contact parts between respective members is largely strengthened, the air is prevented from leaking out through a crack in the contact part without secondary filtering by the filter member. Therefore, efficiency of the cleaning operation is increased. Moreover, since the air exhausted from the suction motor passes through all of the exhaust air flow path without leaking out, the suppressing and absorbing effect is increased. Furthermore, with an embodiment of a noise absorbing device of the invention, since a specific structure of the exhaust air flow path is provided, it is possible to produce a compact and low noise vacuum cleaner.
  • a noise absorbing device for a vacuum cleaner of the invention has a suction motor 10 having a front suction portion 11 for sucking in dust and a rear exhaust portion 13 for exhausting the sucked dust.
  • a suction motor 10 By driving the suction motor 10, air is sucked in through the front suction portion 11 and exhausted through penetrating holes 15 of the rear exhaust portion 13.
  • a front casing 20 has a first main body 21 of cylindrical shape for receiving the suction motor 10.
  • the first main body 21 is provided with a first suction opening 23 to suck in dust into the front suction portion by operation of the suction motor, and with a first opened side face 22 opposite to the first suction opening 23.
  • the first suction opening 23 of the front casing 20 makes contact with a suction port 82 of the vacuum cleaner.
  • the front suction portion 11 of the suction motor 10 is installed inside the front casing 20 and makes contact with the first suction opening 23.
  • a penetrating hole 25 is formed through a lower cylindrical surface of the first main body 21.
  • a lower chamber 26 communicates with the first main body 21 by the penetrating hole 25.
  • a side face of the lower chamber 26 arranged with the first opened side face of the first main body 21 is opened.
  • An upper chamber 27 is installed on an upper part of the first main body 21.
  • a side face of the upper chamber 27 arranged with the first opened side face of the first main body 21 is opened.
  • a filter receiving part 28 is formed at an upper part of the upper chamber 27.
  • the filter receiving part 28 has a filtering member 91 and grill 92 for seating the filtering member 91.
  • An air guider 40 is installed inside the front casing 20.
  • the air guider 40 has a second cylindrical main body 41 spaced away from an inner face of the front casing 20.
  • the air guider 40 has a second opened side face and an opposite second closed side face closed with a closing plate 43.
  • a mounting hole is formed through a center portion of the closing plate 43 for mounting a motor-mounter 49.
  • the rear exhaust portion 13 of the suction motor 10 is inserted through the second opened side face of the second main body 41.
  • a projector 17 for mounting is inserted into the mounting hole 47 and fixed by the motor-mounter 49.
  • a length of the cylindrical main body 41 is so determined to correspond with that of the rear exhaust portion 13 of the suction motor 10 so that a circular end 42 of the opened face can be closely fixed to the suction motor 10.
  • the circular end 42 is preferably formed of sealing material such as rubber.
  • the closing plate 43 closes the first opened side face 22 of the first main body 21 of the front casing 20.
  • a cross-section of a contact part between the opened side face 22 of the first main body 21 of the front casing 20 and the closing plate 43 of the air guider 40 has a step shape, so that the contact part between the opened side face 22 of the front casing 20 and the closing plate 43 of the air guider 40 can be completely sealed.
  • a top penetrating hole 45 is formed through a top surface of the second main body 41.
  • a rear casing 30 has a cover shape for covering the open side faces of the front casing 20, and makes the upper chamber 27 and the lower chamber 26 communicate to each other, so that air exhausted from the suction motor 10 can pass through the lower chamber 26 and then proceed to the upper chamber 27 from the lower chamber 26 along the path made by rear casing 30.
  • noise absorbing material is installed on the air flow path having the inner surface and the outer surface of the second main body 41 of the air guider 40 and the inner surface of the front casing 20.
  • a motor packing member 50 is installed between the front casing 20 and the suction motor 10 to absorb noise and vibration of the motor 10 generated during driving the suction motor 10.
  • a linear recess part 29 of U-shaped cross section is formed on an outermost edge of the opened faces of the front casing 20 or an edge of the rear casing 30, at which the front casing 20 and the rear casing 30 meet, and a linear sealing member 60 is inserted into the linear recess part 29.
  • a fixing part 31 is installed on the inside surface of the rear casing 30 at a corresponding position to the motor-mounter 49.
  • the sucked in air, which has been first-filtered in the dust collecting chamber 80 passes in order through the suction port 82, the first suction opening 23, and the front suction portion 11 of the suction motor 10, and then is sucked into the suction motor 10.
  • the air is exhausted into the inside of the cylindrical main body 41 of the air guider 40 via the penetrating holes 15.
  • the guided air is downwardly guided along the outer surface of the cylindrical body 41 of the air guider 40.
  • the guided air flows into the lower chamber 26 through the penetrating hole 25 formed at the bottom surface of the first main body 21 of the front casing 20.
  • the air passes through the air flow path formed by the rear casing 30, and then flows into the upper chamber 27.
  • the guided air passes through the filter receiving part 28, so that the air is secondarily purified by the filtering member 91.
  • the length of the cylindrical main body 41 of the air guider 40 can be so determined to be shorter than that of the rear exhaust portion 13 of the suction motor 10.
  • the top penetrating hole 45 penetrating the upper cylindrical surface of the second main body 41 of the air guider 40 may not be formed.
  • the sucked in air first-filtered in the dust collecting chamber 80 is sucked into the suction motor 10 through the front suction portion 11 of the suction motor 10.
  • the air is exhausted through the penetrating holes 15 of the rear exhaust portion 13.
  • the exhausted air is guided to the outside of the air guider 40 through the aperture formed between the circular end 42 of the cylindrical main body 41 of the air guider 40 and the suction motor 10.
  • the air guided to the outside of the air guider 40 is downwardly guided along the outer surface of the cylindrical body 41 of the air guider 40.
  • the guided air flows into the lower chamber 26 through the penetrating hole 25 formed at the bottom surface of the first main body 21 of the front casing 20.
  • the air is guided into the upper chamber 27, and passes through the filter receiving part 28, so that the air is secondarily purified by the filtering member 91.
  • a linear recess part 29 having U-shaped cross section is formed on an outermost edge of the opened surfaces of the front casing 20 or the rear casing 30, and a linear sealing member 60 is inserted, so that sealing strength between the front casing and the rear casing can be strengthened.
  • a cross-section of a contact part between the opened side face 22 of the first main body 21 of the front casing 20 and the closing plate 43 of the air guider 40 has a step shape, so that sealing strength between the opened side face 22 of the front casing 20 and the closing plate 43 of the air guider 40 can be strengthened.
  • the noise absorbing device for a vacuum cleaner of the invention since the sealing strength of contact parts between respective members are largely strengthened, the air is prevented from leaking out through a crack in the contact part without secondary filtering by the filter member 91. Therefore, efficiency of the cleaning operation is increased. Moreover, since the air exhausted from the suction motor passes through all of the exhaust air flow path without leaking out, the suppressing and absorbing effect is increased.
  • a noise absorbing device of the invention makes it possible to produce a compact and low noise vacuum cleaner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Electric Suction Cleaners (AREA)

Abstract

A noise absorbing device for a vacuum cleaner has a suction motor (10) installed in a front casing (20). The front casing has a first main body (21) with a first suction opening (23) connected to the suction motor. An opposite side face of the first main body (21) is open. A lower chamber (26) communicates with the first main body by a penetrating hole (25). An upper chamber (27) is installed on an upper part of the first main body (21). The lower chamber and the upper chamber (26) communicate with each other by way of a rear casing (30) which covers the front casing. An air guider (40) is installed inside the front casing. The air guider (40) has a open side face, an opposite, closed side face closed with a closing plate (43). A top penetrating hole (45) extends through a top surface of the second main body. Air sucked into the suction motor (10) is exhausted to the inside of the air guider (40). The air is guided to the outside of the air guider by way of the top penetrating hole (45), and is then guided along the outer surface of the cylindrical body of the air guider, and into the lower chamber (26) through the penetrating hole (25). The air flows into the upper chamber (27) through the air flow path formed by the rear casing (30), and is exhausted to the outside of the vacuum cleaner through a filter receiving part (28). The tortuous nature of the air exhaust path increases its length, and hence the noise absorbence thereof, particularly if it is provided with noise absorbing material. The provisions of a filter in the air exhaust path enhances the efficiency of the vacuum cleaner.

Description

The present invention relates to a noise absorbing device for a vacuum cleaner.
In the prior art, several types of noise absorbing devices for vacuum cleaners have been proposed and widely used.
For example, Japanese U.M. Publication No. Sho. 62-45631 (applied for on Oct. 23, 1981 and published on Dec. 7, 1987) discloses a noise absorbing device of a vacuum cleaner which is shown in Figure 1 of the accompanying drawings.
As shown in Figure 1, a substantially conventional vacuum cleaner comprises a suction motor 2 provided in a cleaner housing 1. In Figure 1, the suction motor 2 is connected with a suction port 8. The air is exhausted to the rear portion of the suction motor 2 through the suction port 8. The exhaust port provided on the back of the housing 1 for exhausting the purified air to the outside is denoted by the numeral 3. The suction motor 2 for generating suction force communicates with the exhaust port 3 through both an air path 4 and an exhaust silencer 5. The exhaust silencer 5 defines an exhaust path 6 therein. In the above noise absorbing device, the exhaust path 6 of the exhaust silencer 5 is inclined upwardly from an air path 4 at an obtuse angle. With the inclined relationship between the exhaust path 6 and air path 4 of the housing 1, it is possible to suppress the turbulence noise caused by the exhaust air flow having already passed through the suction motor 2. In the above silencing device, the turbulence noise is partly absorbed and suppressed by a noise absorbing material 7.
However, the known noise absorbing device for a vacuum cleaner, whilst partly absorbing and suppressing the exhaust noise caused by exhaust air flow having passed through the suction motor 2, does not achieve the desired noise absorbing and suppressing effect.
Moreover, the exhaust air passing through the suction motor 2 is exhausted directly through a chink of the assembled part of the housing 1 to the outside, which causes the efficiency of the cleaning working to deteriorate.
It is an object of the present invention to provide a noise absorbing device for a vacuum cleaner which reduces the problems of known devices.
According to a first aspect of the present invention there is provided a noise absorbing device for a vacuum cleaner having a suction motor installed within a casing, said noise absorbing device comprising air guiding means arranged to receive the air exhausted from said suction motor, the air guiding means being arranged to guide the exhausted air along a tortuous path to an air exhaust, and said noise absorbing device further comprising filter means associated with said air exhaust to filter the exhausted air as it exhausts through said air exhaust.
The provision of the tortuous path to the air exhaust in an embodiment increases the ability of the device to absorb noise.
In an embodiment, said air guiding means is substantially cylindrical and is arranged to surround air exhaust outlets of the suction motor, and wherein the air guiding means is arranged within said casing and guides air exhausted through said exhaust outlets of the suction motor to an exhaust air path defined within said casing, which exhaust air path is terminated by said air exhaust and houses said filter means.
An embodiment of a noise absorbing device of the invention enables the efficiency of cleaning to be increased in that it enables substantially perfect sealing.
The present invention also extends to a noise absorbing device of a vacuum cleaner which comprises:
  • a suction motor having a front suction portion for sucking in dust and a rear exhaust portion for exhausting the sucked dust;
  • a front casing for receiving the suction motor, the front casing having a first main body provided with a first suction opening to suck dust into the front suction portion by operation of the suction motor and a first main body provided with a first opened side face opposite to the first suction opening, the front casing having a penetrating hole formed through a bottom surface of the first main body, the front casing having a lower chamber for communicating with the first main body by the penetrating hole, a side face of the lower chamber arranged with the first opened side face of the first main body being opened, the front casing having an upper chamber installed on an upper part of the first main body and provided with a filter receiving part formed on an upper part of the upper chamber, and a side face of the upper chamber arranged with the first opened side face of the first main body being opened;
  • an air guider for guiding exhaust air along an extended exhaust air flow path formed between an outer surface of the air guider and an inner surface of the front casing, the air guider having a second main body spaced away from the inner surface of the front casing inside the front casing, the air guider having a second opened side face and an opposite second closed side face closed with a closing plate, the air guider having a top penetrating hole formed through a top surface of the second main body to upwardly exhaust air sucked by the suction motor, the rear exhaust part of the suction motor being inserted through the second opened side face, and the closing plate closing the first opened side face of the first main body of the front casing; and
  • a rear casing for covering the open side faces of the front casing, the upper chamber and lower chamber of the front casing communicating with each other by the rear casing, and thereby exhaust air from the suction motor proceeding to the upper chamber from the lower chamber.
    • A motor packing member may be installed between the front casing and the suction motor to absorb noise and vibration of the motor generated during driving of the suction motor.
    In an embodiment of a noise absorbing device of the present invention, absorbing noise material is installed on the very long air flow path, for example, having the inner surface and the outer surface of the second main body of the air guider and the inner surface of the front casing. Noise generated by the suction motor during cleaning operations of the vacuum cleaner is thereby effectively suppressed and absorbed.
    Furthermore, a linear recess part of U-shaped cross section is formed on an outermost edge of the opened surfaces of the front casing or the rear casing, and a linear sealing member is inserted, so that the sealing strength between the front casing and the rear casing can be strengthened.
    A cross-section of a contact part between the opened side face of the first main body of the front casing and the closing plate of the air guider has a step shape, so that sealing strength between the opened side face of the front casing and the closing plate of the air guider can be strengthened.
    In a preferred embodiment, the length of the second main body of the air guider is determined to correspond with that of the rear exhaust portion of the suction motor so that a circular end of the opened face of the second main body is closely fixed to the suction motor.
    Preferably, the circular end of the air guider is formed of sealing material such as rubber.
    Alternatively, the length of the second main body of the air guider is determined to be shorter than that of the rear exhaust portion of the suction motor, so that the exhausted air from the suction motor is guided to the outside of the air guider through the aperture formed between an end of the second main body of the air guider and the suction motor.
    In an embodiment of a noise absorbing device of the present invention, since sealing strength of contact parts between respective members is largely strengthened, the air is prevented from leaking out through a crack in the contact part without secondary filtering by the filter member. Therefore, efficiency of the cleaning operation is increased. Moreover, since the air exhausted from the suction motor passes through all of the exhaust air flow path without leaking out, the suppressing and absorbing effect is increased. Furthermore, with an embodiment of a noise absorbing device of the invention, since a specific structure of the exhaust air flow path is provided, it is possible to produce a compact and low noise vacuum cleaner.
    Embodiments of the present invention will hereinafter be described, by way of example, with reference to the accompanying drawings, in which:
  • Figure 1 is a schematic cross-sectional view showing a substantially conventional vacuum cleaner;
  • Figure 2 is an exploded perspective view showing a noise absorbing device of a vacuum cleaner of one embodiment of the present invention;
  • Figure 3 is a perspective view showing a noise absorbing device of the vacuum cleaner of Figure 2; and
  • Figure 4 is a schematic view showing a vacuum cleaner in which the noise absorbing device of Figure 2 is mounted.
    • As shown in Figure 2, a noise absorbing device for a vacuum cleaner of the invention has a suction motor 10 having a front suction portion 11 for sucking in dust and a rear exhaust portion 13 for exhausting the sucked dust. By driving the suction motor 10, air is sucked in through the front suction portion 11 and exhausted through penetrating holes 15 of the rear exhaust portion 13.
    A front casing 20 has a first main body 21 of cylindrical shape for receiving the suction motor 10. The first main body 21 is provided with a first suction opening 23 to suck in dust into the front suction portion by operation of the suction motor, and with a first opened side face 22 opposite to the first suction opening 23. The first suction opening 23 of the front casing 20 makes contact with a suction port 82 of the vacuum cleaner. The front suction portion 11 of the suction motor 10 is installed inside the front casing 20 and makes contact with the first suction opening 23. A penetrating hole 25 is formed through a lower cylindrical surface of the first main body 21. A lower chamber 26 communicates with the first main body 21 by the penetrating hole 25. A side face of the lower chamber 26 arranged with the first opened side face of the first main body 21 is opened. An upper chamber 27 is installed on an upper part of the first main body 21. A side face of the upper chamber 27 arranged with the first opened side face of the first main body 21 is opened. A filter receiving part 28 is formed at an upper part of the upper chamber 27. The filter receiving part 28 has a filtering member 91 and grill 92 for seating the filtering member 91.
    An air guider 40 is installed inside the front casing 20. The air guider 40 has a second cylindrical main body 41 spaced away from an inner face of the front casing 20. The air guider 40 has a second opened side face and an opposite second closed side face closed with a closing plate 43. A mounting hole is formed through a center portion of the closing plate 43 for mounting a motor-mounter 49. The rear exhaust portion 13 of the suction motor 10 is inserted through the second opened side face of the second main body 41. A projector 17 for mounting is inserted into the mounting hole 47 and fixed by the motor-mounter 49.
    A length of the cylindrical main body 41 is so determined to correspond with that of the rear exhaust portion 13 of the suction motor 10 so that a circular end 42 of the opened face can be closely fixed to the suction motor 10. The circular end 42 is preferably formed of sealing material such as rubber.
    The closing plate 43 closes the first opened side face 22 of the first main body 21 of the front casing 20. A cross-section of a contact part between the opened side face 22 of the first main body 21 of the front casing 20 and the closing plate 43 of the air guider 40 has a step shape, so that the contact part between the opened side face 22 of the front casing 20 and the closing plate 43 of the air guider 40 can be completely sealed.
    A top penetrating hole 45 is formed through a top surface of the second main body 41.
    Thus, air sucked by the suction motor 10 is upwardly guided and exhausted through the top penetrating hole 45 of the air guider 40.
    A rear casing 30 has a cover shape for covering the open side faces of the front casing 20, and makes the upper chamber 27 and the lower chamber 26 communicate to each other, so that air exhausted from the suction motor 10 can pass through the lower chamber 26 and then proceed to the upper chamber 27 from the lower chamber 26 along the path made by rear casing 30.
    In order to absorb and suppress noise during cleaning operation of the vacuum cleaner, noise absorbing material is installed on the air flow path having the inner surface and the outer surface of the second main body 41 of the air guider 40 and the inner surface of the front casing 20.
    A motor packing member 50 is installed between the front casing 20 and the suction motor 10 to absorb noise and vibration of the motor 10 generated during driving the suction motor 10.
    In order to strengthen the sealing strength between the front casing 20 and the rear casing 30, a linear recess part 29 of U-shaped cross section is formed on an outermost edge of the opened faces of the front casing 20 or an edge of the rear casing 30, at which the front casing 20 and the rear casing 30 meet, and a linear sealing member 60 is inserted into the linear recess part 29.
    To fix motor-mounter 49, a fixing part 31 is installed on the inside surface of the rear casing 30 at a corresponding position to the motor-mounter 49.
    The operation of the foregoing embodiment described above will now be explained.
    When a vacuum cleaner having a noise absorbing device as described above is used to perform a cleaning operation, air including dust at the place to be cleaned is sucked into a dust bag 81 of a dust collecting chamber 80 by the sucking force generated by driving the suction motor 10 in the noise absorbing device 1.
    The sucked in air, which has been first-filtered in the dust collecting chamber 80 passes in order through the suction port 82, the first suction opening 23, and the front suction portion 11 of the suction motor 10, and then is sucked into the suction motor 10. The air is exhausted into the inside of the cylindrical main body 41 of the air guider 40 via the penetrating holes 15.
    Since the circular end 42 of the cylindrical main body 41 of the air guider 40 is closely fixed to the suction motor 10, the exhaust air is guided to the outside of the air guider 40 through the top penetrating hole 45 penetrating the upper cylindrical surface of the air guider 40.
    Since the opened side face 22 of the first main body 21 of the front casing 20 and the closing plate 43 of the air guider 40 are completely sealed to each other, the guided air is downwardly guided along the outer surface of the cylindrical body 41 of the air guider 40.
    The guided air flows into the lower chamber 26 through the penetrating hole 25 formed at the bottom surface of the first main body 21 of the front casing 20. The air passes through the air flow path formed by the rear casing 30, and then flows into the upper chamber 27.
    The guided air passes through the filter receiving part 28, so that the air is secondarily purified by the filtering member 91.
    In another embodiment, the length of the cylindrical main body 41 of the air guider 40 can be so determined to be shorter than that of the rear exhaust portion 13 of the suction motor 10. The top penetrating hole 45 penetrating the upper cylindrical surface of the second main body 41 of the air guider 40 may not be formed.
    At this time, the sucked in air first-filtered in the dust collecting chamber 80 is sucked into the suction motor 10 through the front suction portion 11 of the suction motor 10. The air is exhausted through the penetrating holes 15 of the rear exhaust portion 13. The exhausted air is guided to the outside of the air guider 40 through the aperture formed between the circular end 42 of the cylindrical main body 41 of the air guider 40 and the suction motor 10. The air guided to the outside of the air guider 40 is downwardly guided along the outer surface of the cylindrical body 41 of the air guider 40. The guided air flows into the lower chamber 26 through the penetrating hole 25 formed at the bottom surface of the first main body 21 of the front casing 20.
    The air is guided into the upper chamber 27, and passes through the filter receiving part 28, so that the air is secondarily purified by the filtering member 91.
    In embodiments of the present invention, due to the absorbing noise material installed on the very long air flow path having the inner surface and the outer surface of the second main body 41 of the air guider 40 and the inner surface of the front casing, noise generated by the suction motor 10 during cleaning operation of the vacuum cleaner is effectively suppressed and absorbed.
    Furthermore, a linear recess part 29 having U-shaped cross section is formed on an outermost edge of the opened surfaces of the front casing 20 or the rear casing 30, and a linear sealing member 60 is inserted, so that sealing strength between the front casing and the rear casing can be strengthened. A cross-section of a contact part between the opened side face 22 of the first main body 21 of the front casing 20 and the closing plate 43 of the air guider 40 has a step shape, so that sealing strength between the opened side face 22 of the front casing 20 and the closing plate 43 of the air guider 40 can be strengthened.
    With embodiments of the noise absorbing device for a vacuum cleaner of the invention, since the sealing strength of contact parts between respective members are largely strengthened, the air is prevented from leaking out through a crack in the contact part without secondary filtering by the filter member 91. Therefore, efficiency of the cleaning operation is increased. Moreover, since the air exhausted from the suction motor passes through all of the exhaust air flow path without leaking out, the suppressing and absorbing effect is increased.
    Furthermore, since a specific structure for the exhaust air flow path is provided, a noise absorbing device of the invention makes it possible to produce a compact and low noise vacuum cleaner.
    The invention has been illustrated and described with reference to particular embodiments thereof. However, it will be appreciated that various changes may be made without departing from the scope of the invention as defined by the appended claims.

    Claims (10)

    1. A noise absorbing device for a vacuum cleaner having a suction motor installed within a casing, said noise absorbing device comprising air guiding means arranged to receive the air exhausted from said suction motor, the air guiding means being arranged to guide the exhausted air along a tortuous path to an air exhaust, and said noise absorbing device further comprising filter means associated with said air exhaust to filter the exhausted air as it exhausts through said air exhaust.
    2. A noise absorbing device as claimed in Claim 1, wherein said air guiding means is substantially cylindrical and is arranged to surround air exhaust outlets of the suction motor, and wherein the air guiding means is arranged within said casing and guides air exhausted through said exhaust outlets of the suction motor to an exhaust air path defined within said casing, which exhaust air path is terminated by said air exhaust and houses said filter means.
    3. A noise absorbing device of a vacuum cleaner comprising:
      a suction motor having a front suction portion for sucking in dust and a rear exhaust portion for exhausting the sucked dust;
      a front casing for receiving the suction motor, the front casing having a first main body provided with a first suction opening to suck in the dust into the front suction portion by operation of the suction motor and a first main body provided with a first opened side face opposite to the first suction opening, the front casing having a penetrating hole formed through a bottom surface of the first main body, the front casing having a lower chamber for communicating with the first main body by the penetrating hole, a side face of the lower chamber arranged with the first opened side face of the first main body being opened, the front casing having an upper chamber installed on an upper part of the first main body and provided with a filter receiving part formed on an upper part of the upper chamber, and a side face of the upper chamber arranged with the first opened side face of the first main body being opened;
      an air guider for guiding exhaust air along an extended exhaust air flow path formed between an outer surface of the air guider and an inner surface of the front casing, the air guider having a second main body spaced away from the inner surface of the front casing inside the front casing, the air guider having a second opened side face and an opposite second closed side face closed with a closing plate, the air guider having a top penetrating hole formed through a top surface of the second main body to upwardly exhaust air sucked by the suction motor, the rear exhaust part of the suction motor being inserted through the second opened side face, the closing plate closing the first opened side face of the first main body of the front casing; and
      a rear casing for covering the open side faces of the front casing, the upper chamber and lower chamber of the front casing communicating with each other by the rear casing, and thereby exhaust air from the suction motor proceeding to the upper chamber from the lower chamber.
    4. A noise absorbing device of a vacuum cleaner as claimed in Claim 3, wherein a noise absorbing material is installed on the air flow path having the inner surface and the outer surface of the second main body of the air guider and the inner surface of the front casing in order to absorb and suppress noise during cleaning operation of the vacuum cleaner.
    5. A noise absorbing device of a vacuum cleaner as claimed in Claim 3 or Claim 4, wherein a linear recess part of U-shaped cross section is formed on an outermost edge of the opened faces of the front casing or an edge of the rear casing, at which the front casing and the rear casing meet, and a linear sealing member is inserted into the linear recess part in order to strengthen sealing strength between the front casing and the rear casing.
    6. A noise absorbing device of a vacuum cleaner as claimed in any of Claims 3 to 5, wherein the closing plate closes the first opened side face of the first main body of the front casing.
    7. A noise absorbing device of a vacuum cleaner as claimed in any of Claims 3 to 6, wherein a cross-section of a contact part between the opened side face of the first main body of the front casing and the closing plate of the air guider has a step shape, so that the contact part between the opened side face of the front casing and the closing plate of the air guider can be completely sealed.
    8. A noise absorbing device of a vacuum cleaner as claimed in any of Claims 3 to 7, wherein the contact part between the opened side face of the first main body of the front casing and the closing plate of the air guider is formed of sealing material such as rubber.
    9. A noise absorbing device of a vacuum cleaner as claimed in any of Claims 3 to 8, wherein the length of the second main body of the air guider is determined to correspond with that of the rear exhaust portion of the suction motor so that a circular end of the opened face of the second main body is closely fixed to the suction motor.
    10. A noise absorbing device of a vacuum cleaner as claimed in any of Claims 3 to 8, wherein the length of the second main body of the air guider is determined to be shorter than that of the rear exhaust portion of the suction motor, so that the exhausted air from the suction motor is guided to the outside of the air guider through the aperture formed between an end of the second main body of the air guider and the suction motor.
    EP98303842A 1997-06-30 1998-05-15 Noise absorbing device for vacuum cleaner Withdrawn EP0888742A1 (en)

    Applications Claiming Priority (4)

    Application Number Priority Date Filing Date Title
    KR9729905 1997-06-30
    KR1019970029905A KR19990005690A (en) 1997-06-30 1997-06-30 Sound-absorbing room with upper exhaust passage of vacuum cleaner
    KR9755331 1997-10-27
    KR1019970055331A KR100231436B1 (en) 1997-10-27 1997-10-27 MCS(Muffler Chamber System) of Vacuum Cleaner

    Publications (1)

    Publication Number Publication Date
    EP0888742A1 true EP0888742A1 (en) 1999-01-07

    Family

    ID=26632900

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98303842A Withdrawn EP0888742A1 (en) 1997-06-30 1998-05-15 Noise absorbing device for vacuum cleaner

    Country Status (3)

    Country Link
    US (1) US5991969A (en)
    EP (1) EP0888742A1 (en)
    JP (1) JPH1132947A (en)

    Cited By (8)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US6779228B2 (en) 2001-01-24 2004-08-24 Alexandre Plomteux Quiet central vacuum power unit
    AU777386B2 (en) * 2001-12-20 2004-10-14 Lg Electronics Inc. Motor housing for vacuum cleaner
    EP1649796A2 (en) * 2004-10-19 2006-04-26 Soteco S.p.A. Suction cleaning apparatus
    WO2008006280A1 (en) * 2006-07-03 2008-01-17 Suzhou Kingclean Floorcare Co., Ltd. Cyclone silencer of cleaner and dust removing device having the same
    EP1917894A1 (en) * 2006-10-31 2008-05-07 Samsung Gwangju Electronics Co., Ltd. Motor-noise absorbing apparatus of vacuum cleaner
    CN100421608C (en) * 2003-08-22 2008-10-01 松下电器产业株式会社 Vacuum cleaner
    EP2057927A2 (en) * 2007-11-05 2009-05-13 Samsung Gwangju Electronics Co., Ltd. Discharging apparatus and vacuum cleaner having the same
    CN108289578A (en) * 2015-12-04 2018-07-17 伊莱克斯公司 Vacuum cleaner

    Families Citing this family (15)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    KR100433411B1 (en) * 2002-03-21 2004-05-31 삼성광주전자 주식회사 Discharging duct for upright-type vacuum cleaner
    CN1179700C (en) * 2002-12-12 2004-12-15 苏州金莱克清洁器具有限公司 Silencer for dust collector
    KR100500848B1 (en) 2003-07-07 2005-07-12 삼성광주전자 주식회사 Motor assembly and vacuum cleaner having the same
    US7614113B2 (en) * 2003-07-31 2009-11-10 Panasonic Corporation Of North America Motor enclosure for a vacuum cleaner
    CN1256908C (en) * 2003-08-26 2006-05-24 苏州金莱克清洁器具有限公司 Dust-collector noise silencer
    CN1279868C (en) 2003-08-26 2006-10-18 苏州金莱克清洁器具有限公司 Dust-collector noise silencer
    KR101143773B1 (en) * 2004-12-03 2012-05-11 엘지전자 주식회사 Noise reduction system for fan-motor of vacuum cleaner
    US20070174992A1 (en) * 2005-09-30 2007-08-02 Murray Christopher W Quiet vacuum cleaner
    KR101212291B1 (en) * 2005-12-30 2012-12-12 삼성전자주식회사 Vaccum Air Cleaner
    US8578553B2 (en) * 2011-03-04 2013-11-12 G.B.D. Corp. Sound shield for a surface cleaning apparatus
    DE102015115984A1 (en) * 2015-09-22 2017-03-23 Miele & Cie. Kg Exhaust air filter for a vacuum cleaner, motor housing for a motor of a vacuum cleaner, vacuum cleaner and method of manufacturing a vacuum cleaner
    DK3238592T3 (en) 2016-04-27 2021-07-19 Diversey Inc VACUUM CLEANER
    KR102492164B1 (en) * 2016-07-22 2023-01-30 삼성전자주식회사 Vacuum cleaner
    JP7330720B2 (en) * 2019-03-05 2023-08-22 株式会社マキタ Backpack dust collector
    CN112545375B (en) * 2020-11-03 2023-05-23 广东美的白色家电技术创新中心有限公司 Be applied to cleaning device's wind channel subassembly, air-out module and cleaning device

    Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE4100858A1 (en) * 1991-01-14 1992-07-16 Siemens Ag Vacuum cleaner with blower unit - has blower in inner housing capsule located in outer capsule, leaving flow space, and free space between outer capsule and housing
    EP0528451A1 (en) * 1991-07-26 1993-02-24 Daewoo Electronics Co., Ltd. A vacuum cleaner
    US5720074A (en) * 1995-08-31 1998-02-24 Daewoo Electronics Co., Ltd Vacuum cleaner having a noise reduction system

    Family Cites Families (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JPS5235476A (en) * 1975-09-16 1977-03-18 Tokyo Electric Co Ltd Electric cleaner
    JPH01305916A (en) * 1988-06-06 1989-12-11 Hitachi Ltd Electric cleaner
    JP3041714B2 (en) * 1990-08-10 2000-05-15 三菱電機ホーム機器株式会社 Electric vacuum cleaner
    JP2743577B2 (en) * 1990-11-20 1998-04-22 松下電器産業株式会社 Electric vacuum cleaner
    JPH04319324A (en) * 1991-04-18 1992-11-10 Matsushita Electric Ind Co Ltd Vacuum cleaner
    JPH053842A (en) * 1991-06-28 1993-01-14 Sharp Corp Cleaner
    JPH05176868A (en) * 1991-12-27 1993-07-20 Nippon Petrochem Co Ltd Vacuum cleaner with abated noise

    Patent Citations (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE4100858A1 (en) * 1991-01-14 1992-07-16 Siemens Ag Vacuum cleaner with blower unit - has blower in inner housing capsule located in outer capsule, leaving flow space, and free space between outer capsule and housing
    EP0528451A1 (en) * 1991-07-26 1993-02-24 Daewoo Electronics Co., Ltd. A vacuum cleaner
    US5720074A (en) * 1995-08-31 1998-02-24 Daewoo Electronics Co., Ltd Vacuum cleaner having a noise reduction system

    Cited By (12)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US6779228B2 (en) 2001-01-24 2004-08-24 Alexandre Plomteux Quiet central vacuum power unit
    AU777386B2 (en) * 2001-12-20 2004-10-14 Lg Electronics Inc. Motor housing for vacuum cleaner
    CN100421608C (en) * 2003-08-22 2008-10-01 松下电器产业株式会社 Vacuum cleaner
    EP1649796A2 (en) * 2004-10-19 2006-04-26 Soteco S.p.A. Suction cleaning apparatus
    EP1649796A3 (en) * 2004-10-19 2006-11-02 Soteco S.p.A. Suction cleaning apparatus
    WO2008006280A1 (en) * 2006-07-03 2008-01-17 Suzhou Kingclean Floorcare Co., Ltd. Cyclone silencer of cleaner and dust removing device having the same
    US7998260B2 (en) 2006-07-03 2011-08-16 Suzhou Kingclean Floorcare Co., Ltd. Cyclone silencer of cleaner and dust removing device having the same
    EP1917894A1 (en) * 2006-10-31 2008-05-07 Samsung Gwangju Electronics Co., Ltd. Motor-noise absorbing apparatus of vacuum cleaner
    US8046869B2 (en) 2006-10-31 2011-11-01 Samsung Electronics Co., Ltd. Motor-noise absorbing apparatus of vacuum cleaner
    EP2057927A2 (en) * 2007-11-05 2009-05-13 Samsung Gwangju Electronics Co., Ltd. Discharging apparatus and vacuum cleaner having the same
    EP2057927A3 (en) * 2007-11-05 2011-01-05 Samsung Gwangju Electronics Co., Ltd. Discharging apparatus and vacuum cleaner having the same
    CN108289578A (en) * 2015-12-04 2018-07-17 伊莱克斯公司 Vacuum cleaner

    Also Published As

    Publication number Publication date
    US5991969A (en) 1999-11-30
    JPH1132947A (en) 1999-02-09

    Similar Documents

    Publication Publication Date Title
    EP0888742A1 (en) Noise absorbing device for vacuum cleaner
    EP0636336B1 (en) Vacuum cleaner with silencing device
    KR100613102B1 (en) A suction port assembly and a vacuum cleaner having the same
    CA2470987C (en) Motor assembly and vacuum cleaner having the same
    JP3654330B2 (en) Low noise vacuum cleaner
    KR101436631B1 (en) Vacuum cleaner
    AU2004202983B2 (en) Vacuum Cleaner
    CN115089047A (en) Household dust collector equipped with silencing cavity
    KR100231435B1 (en) MCS(Muffler Chamber System) of Vacuum Cleaner
    JPH07116088A (en) Vacuum cleaner
    KR0133743B1 (en) Muffler chamber system of a vacuum cleaner
    KR100231436B1 (en) MCS(Muffler Chamber System) of Vacuum Cleaner
    KR100231437B1 (en) MCS(Muffler Chamber System) of Vacuum Cleaner
    KR100213365B1 (en) Device for decreasing the noise of vacuum cleaner
    KR200214600Y1 (en) A motor mounting structure of body for vaccum cleaner
    KR200148360Y1 (en) Motor case of vacuum cleaner
    KR200167702Y1 (en) Vacuum cleaner
    KR100582517B1 (en) A suction brush assembly and a vacuum cleaner having the same
    KR100270801B1 (en) A noise absorption device of a vacuum cleaner
    KR0163288B1 (en) Dry type vacuum cleaner
    KR100233512B1 (en) Structure of air flow for vacuum cleaner
    JP2024006431A (en) vacuum cleaner
    KR200143215Y1 (en) Anti-noise reinforcement structure of muffler chamber system in a vacuum cleaner
    KR0128414Y1 (en) Muffler chamber system for vacuum cleaner
    KR0123729Y1 (en) Structure of muffler chamber system in vacuum cleaner

    Legal Events

    Date Code Title Description
    PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

    Free format text: ORIGINAL CODE: 0009012

    AK Designated contracting states

    Kind code of ref document: A1

    Designated state(s): DE ES FR GB

    AX Request for extension of the european patent

    Free format text: AL;LT;LV;MK;RO;SI

    17P Request for examination filed

    Effective date: 19990628

    AKX Designation fees paid

    Free format text: DE ES FR GB

    17Q First examination report despatched

    Effective date: 19990920

    STAA Information on the status of an ep patent application or granted ep patent

    Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

    18D Application deemed to be withdrawn

    Effective date: 20000201